Either I'm fighting the flu AND having an irregular period or I'm pregnant

Ive had two periods since LO and I'm 4 days late on this one with only very light spotting. We've used protection every time but I'm starting to wonder if I'm pregnant. It would be a lot sooner than we planned but I would still be grateful and happy. I've taken two tests but if I just started lightly spottin I'm wondering if I took them too soon. I'll take another one in the AM. Ahhhhhhhh!!!!